The Clearwater Project was approved after a multi-year evaluation of the main sewer system serving nearly half of Los Angeles County. A new 7-mile tunnel, a key component of the project, is being constructed to protect local waterways by addressing aging infrastructure.
Take an up-close look at how Rachel, our tunnel boring machine (TBM), works. In this short video, we explain how the parts of the TBM work.
This 5-minute video provides an overview of the Clearwater Project including what the project is, why it is needed, and how it is constructed.
January 21, 2026
Exploratory drilling is scheduled to continue on southbound Western Avenue this week, including Saturday, January 24 from 9 am to 3 pm. Traffic control will shift to the sidewalk side of the south bound lanes starting tomorrow, January 22. Vehicle traffic will proceed through the southbound lane adjacent to the median. The east sidewalk will be closed to pedestrians this Saturday while a utilities check is performed. Please use caution when driving through this area.
December 10, 2025
Please read the following update regarding re-entry to the Clearwater Project tunnel. Click here to read more.
